Sparking device.



D. D. PEBBLBS & A. R. THOMPSON.

SPABKING DEVICE. APPLICATION FILED OOT. 24, 190B.

917,651. Patented Apr. 6, 1909.

A TTORNE Y.

DAVID PEEBLES AND ALBERT R.THOMPSON, OF 'SAN JOSE, CALIFORNIA.

'SPAEKING DEVICE.

Specification of Letters Patent.

Patented April 6, 1909,

Application led October 2 4, 1908. Serial No. 459,802:

To all whom t may concern:

Be 1t known that We, DAVID D. PEEBLEs and ALBERT R. THOMPSON, bothcitizens of the United States, residing at San Jose, in

the county of Santa Clara and State ofCalin foruia, have invented newand useful A-Improvements in Sparkin Devices, of which the following' isa specification.

Our invention relates -to ignitingdevices of the jump-spark variety, foruse in auto-. mobile and other gas engines. l

'lhe object of the invention is to provide a simple practical means forquickly removing, cleaning or inspecting the sparkplug at any time, andwithout the use of any screws, or any screw movement of any of the partThe invention consists-of. the parts and the construction andlcombination of parts as hereinafter more fully Idescribed and claimed,having reference to the accompanying drawings, in which- A Figure l 1S apart elevation and part sectional View of a sparking device embodyingour invention, Fig. 2 is a top plan ,view of the same.

A represents a socket member adapted to be screwed for otherwisesuit-ably secured in the cylinder.

2 is a metal sleeve adapted to be slipped inside of the socket, andhaving a reduced lower end with a shoulder portion 3 seating ona-corresponding shoulder or ledge l A on. the inside of the socket. A'contact meml0 is a bifurcated latch member pivotedto the socket memberA at l1, and adapted to straddle the plug 6 and to rcstupon "the outerend or head ofthebushing l9. The ends of the latch member 140 areprovided Withvsuitable cam surfaces 12', with which a hinged jlatchmember 13 fisadapted to engage. i l

With the arts assembled as shown, the device is rea y foruse. v

AThe sleeve 2 forms a' tight joint at l and provides a good seat for theporcelain core.

If desired, the porcelain core may be provided With an annular steelseat 14 to impin e on the inside of the shoulder 3. This stee seat ,14,when ground into the plug, does away with the need -of any copperWashers, and .provides a tight seat that will notyield oropen-When`pressure comes on it.

To remove the plug 6, in order to get at. either of the contactsv @-5,it is only necessary to trip the catch 13, lift the latch-10,

and withdraw the loose bushing 9; whereupon the-plug comes out readily.

By this method -of construction the plug is held in place entirelyWithout the use of screws, or any screw or turnable part.

Having thus described our invention, what we c laim and desire to secureby Letters Patent is- 1. In a sparking device, the combination of a'socket member adapted to be secured in the cylinder. an insulatedremovable contact member fitting the socket, la bushing fitting looseover .this` insulated contact member and fitting loose in saidsocketmember, and a clamping means carried by said socket inember andengaging the bushing to lock the parts in assembled operative position.

2. In a sparking device, thevcombination ot' a socketanember having areduced lowerv end. a metal sleeve seating in the socket, an insulatedremovable Contact member seating in the sleeve, said sleeve having acompleinentary contactmember, a bushing fitting in the sleeve andseating on' the insulation ing to lockthe ,parts in assem led operativeposition.

carrying a. contact member In testimony set our hands 1n presence of twosubscribing witnesses.

DAVID D. PEEBLES. ALBERT R. THOMPSON.

Witnesses as to the signature of David D. Peebles:

LFJLA ELINOO PEEBLES. Romzn'r R. SYER.

Witnesses as to the signature of Albert R. Thompson:

C. P. Donn,

CSO. DURRAN.

whereof we have .hereunto 15

